Improved bailwat snow-plough



'instea of from only one side thereof, for when the @man strut @HireELISHA ROBBINS, OF WORCESTER, MASSACHUSETTS.

Letters Patent No. 75,979, dated March 24, 1868.

IMPROVIID RAILWAY SN OW-PLOUGB.

TO ALLPERSONS TO WHOM THESE PRESENTS MAY COME:

Be it known that I, ELISIIA ROBBINS, of the city and county ofWorcester, and State of invented a new and useful or improvedSnow-Plough or Excavator, cleaning itrof snow.; and I do hereby declarethe same to be fully d represented in the accompanying drawings, ofwhich- Figure 1 is a top view, l

Figure 2 a side elevation,

Figure 3 alongitudinal section,

Figure 4 a frontend elevation, and

Figure 5 a transverse section of it. t

In-sueh drawings, A'denotes a plough or tunneller, supported by means oftwo or more axles a a, having two wheels, b b,`to each, the same beingto enable the tunneller to run upon the trackfrails ofa railway. Thefront end ofthe said tunnellerA is to be formed in'manner as representedin figs. 3 and 4, that is, with 'cutters c .c c c, so as to eut the snowfrom the rails, or cut a trench'tiirough it, which shall be horizontalat bottom, and have 'either vertical or flaring sides. The mouth of thetunnelle whichis one or more lateral deilectors or ploughshares e e,arranged so as to discharge laterally any snow which may be driven backagainst them, or against which such dellector or delectors may beforced. Auxiliary 'deileetors or .ploughsharesfj arranged on the upper"surface of the tunneller, in manner as exhibited in the drawings,serve-to deflect laterally any'snow `which may pass over the top of thetunneller, and be liable to fall therefrom in front ofthe main deilectoror deilectors. A shaft, B, arranged concentrically and in other respectswith the cylindrical part or bore of the tunneller, in manner asrepresented, has a twisted blade or auger, C, extended from it throughand beyond .the tunneller, in manner as shown in the drawings. Thisauger extends through and is xed to a tube or hollow cylinder, D, whichon its external surface is supported against one or morefriction-wheels, g, arranged in the tunnellcr. The tube serves to directthe snow to the de it from being thrown against lthe bore of thetunneller while thc auger isv'in revolution. or tube is to prevent thefriction ofthe snow against the bore, retard the-rotary motions of theauger. For putting the au around which, andl another pulley, z', onanother shaft, c, m, fixed on the shaft lc, engageswith another suchgear, n, fixed on the rear axle of the'tunneller. Thus, when the saidaxle is in revolntion,lthe auger will be revolved. The saidaugen-however, may be revolved by other means, that is, it'may beoperated by a steam-engine, or other proper mojtor applied to thetunneller, or by th power of the locomotive-engine used in driving thetun'neller ahead on a railway. j

When the plough or excavator is to be used, itmay be driven forward byand in front of a locomotive-engine,

to be used on a railway for the purpose of escribed in the followingspecification, and' The objectI of the director ger in revolution, ithas a pulley, It, on its shaft, an endless chain or band,`Z, travels. Abevelled gear,

Massachusetts, have' r opens from a cylindrical throat, d, in rear oflectors, and prevent l which would otherwise take plaoe and operate to orit may have a steam or other mover fixed directly on it, and applied toits outer shaft and axllso as to effect the rotary movements of both oreach, as circumstances may require.

The excavator, when driven forward into a mass of snow on a railway,will bore into and channel through it and raise it, and deflect itlaterally off the track.- v

the excavator off the track in one direction will be counterbalanced bythat operating in the other. This excavator, while advancing, will notonly bore into but cut its way through the snowi Y I am aware of` theexcavator described in the United States Patent', No. 44,360, andtherefore make no arranged to operate against it so as iso-deflectrperforins the function of boring only. nd the auger or-borer C,arranged as set forth.

, he auger vor borer C, and' one or more deilectors, e e, arranged so asto discharge the snow laterally from 'the auger, as specified.

claim thereto, such being a snow-plough, with certain rotary clearersthe snow in lateral directions. In my excavator, the auger or bore 2 Ialso claim the combination and arrangement of the auxiliary deector ordeiectors ffof tbe fop of the tunneller with the saidtunneller, therotary auger, and' tbeother deector or deectors e e, arranged asspeciiefi. I also claim the oombination and arrangement of theanti-friction-tube D witnthe auger C,'ti1e tunnciiori and one or moredeflectors, arranged in rear of tbe said tube. I,

I also claim the combination of one or more supportingfwbeeis g with theauger-tube D, the tunneller, and on or' more deetors e, as spcified,such roiies being forlsupporting the tube whl in revoiution.

ELISHA ROBB'INS Witnesses: l

` R. H. EDDY,

F. P. HALE, Jr.

